What is a building with two separate homes, each with its own entrance, called?

Which 19th-century British prime minister was nicknamed "Dizzy"? Which nickname for New York City, from a term for a desirable prize, spread from a 1921 newspaper horse-racing column? Which 19th-century German philosopher declared "God is dead"? What was a 19th-century warship protected by metal armor plates called? Which two-time Oscar-winning actress got one of her first jobs as the Coppertone girl at age 3? Nebraska won 20–10 in 2001 in its bitter rivalry with which school's Sooners? "The Edge of Reason" (1999) is Helen Fielding's follow-up to which singleton's diary? Which 2000 comedy introduced the Byrnes family, with the Fockers showing up in its sequels?